A connection system for a modular building box

Abstract

This utility model relates to a connection system for modular building boxes, including a first mechanical joint, a second mechanical joint, a baffle, and a sealing component. The first mechanical joint is embedded in the first box, and the mating end face of the first mechanical joint is flush with the outer surface of the first box. The second box has a pre-reserved connection through hole, and the baffle is disposed in the connection through hole. The connecting end of the second mechanical joint passes through the baffle and connects with the mating end of the first mechanical joint. The sealing component is disposed between the first box and the second box. The closed space formed by the first box, the second box, the sealing component, and the baffle is filled with cement mortar. Its advantages are that it achieves efficient prefabrication and rapid installation of modular buildings, while ensuring the reliability and construction accuracy of the connection nodes, providing a better solution for the industrial application of modular buildings.

Description

Technical Field

[0001] This utility model relates to the field of modular building technology, and in particular to a connection system for modular building boxes. Background Technology

[0002] Modular building is an emerging building structure system where each room is a prefabricated module manufactured in a factory, transported to the site, and assembled into a complete building using reliable connection methods. It involves the factory fabrication and installation of the main structure, enclosure structure, equipment pipelines, and interior decoration, forming standardized prefabricated modular spaces that are then assembled on-site. With its high efficiency and environmental friendliness, modular building has become an important development direction for modern building industrialization.

[0003] Currently, the traditional method of connecting modular building units mostly adopts a process of assembling semi-prefabricated walls and then pouring concrete. This involves using prefabricated thin-shell walls for the walls of two adjacent modular building units, or any one of two adjacent units, to enclose a post-cast area between the two units. A reinforcing cage is then installed in this post-cast area before the concrete is poured to complete the connection. While this process achieves structural connection, it has significant drawbacks: the prefabricated thin-shell walls require on-site assembly and positioning; the reinforcement binding and concrete pouring must be carried out in stages; and the overall connection process is time-consuming. Furthermore, it involves a high proportion of on-site wet work, requiring extensive manual labor, which contradicts the core concept of modular construction.

[0004] Therefore, there is an urgent need for a connection system for modular building boxes that can overcome the wet operation defects of the semi-prefabricated wall post-casting process and improve construction efficiency. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a connection system for modular building boxes, which solves the technical problems of high proportion of wet work on site and long connection process in the prior art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] This utility model provides a connection system for a modular building box, comprising: a first mechanical joint, a second mechanical joint, a baffle, and a sealing component; the first mechanical joint is embedded in the first box, and the mating end face of the first mechanical joint is flush with the outer surface of the first box; the second box has a pre-reserved connection through hole, the baffle is disposed in the connection through hole, and the connecting end of the second mechanical joint passes through the baffle and connects with the mating end of the first mechanical joint; the sealing component is disposed between the first box and the second box; the closed space formed by the first box, the second box, the sealing component, and the baffle is filled with cement mortar.

[0010] Optionally, the second mechanical joint includes an integrally formed connecting rod and a fastening head; the free end of the connecting rod serves as the connecting end of the second mechanical joint, passing through the baffle and connecting to the mating end of the first mechanical joint; the fastening head is located on the side of the baffle opposite to the first mechanical joint and presses against the baffle.

[0011] Optionally, the connecting through hole is a prefabricated stepped hole, which includes a small diameter section and a large diameter section that are interconnected; the baffle is disposed on the large diameter section and located at the connection between the small diameter section and the large diameter section.

[0012] Optionally, the ratio of the diameter of the smaller diameter segment to the diameter of the larger diameter segment is 1:1.5 to 1.8.

[0013] Optionally, the connection method of the first mechanical connector and the second mechanical connector is any one of the following: the mating end of the first mechanical connector has an internal thread, the connecting rod is a threaded rod, and the connecting rod is threadedly connected to the first mechanical head; or, the mating end of the first mechanical connector is a concave slot, and the free end of the connecting rod of the second mechanical connector is a convex plug, and the concave slot and the convex plug cooperate to achieve locking; or, the mating end of the first mechanical connector is provided with a helical groove, and the free end of the connecting rod of the second mechanical connector is provided with a radial convex ridge, and rotating the connecting rod causes the convex ridge to be embedded in the helical groove to form a lock.

[0014] Optionally, the baffle is provided with grouting holes and grout outlet holes; the grout outlet holes are positioned higher than the grouting holes; cement mortar can be injected into the enclosed space through the grouting holes.

[0015] Optionally, the cement mortar is a non-shrink mortar.

[0016] Optionally, the enclosure assembly includes multiple baffles; the multiple baffles are disposed between the wall of the first enclosure and the second enclosure.

[0017] Optionally, the stop bar is a pearl cotton stop bar.

[0018] (III) Beneficial Effects

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides a modular building box connection system. By pre-embedding a first mechanical joint in the first box and integrating a second mechanical joint and baffle in the second box, the walls of the box module can be prefabricated entirely in the factory, completely eliminating the wet work processes of on-site steel reinforcement, formwork sealing, and concrete pouring in traditional processes. On-site work requires only mechanical joint connection and a small amount of grouting, significantly reducing on-site construction intensity and simplifying the construction process. Using mechanical connectors instead of traditional pre-embedded reinforcing bars reduces the need for openings in the prefabrication mold, avoids the impact of transverse reinforcing bars on mold complexity, and reduces the difficulty of box production. Simultaneously, eliminating transverse reinforcing bars compresses the box's transport width, avoiding the size limitations imposed by traditional reinforcing bars, making box transportation more convenient and efficient. Through grouting within the pre-drilled holes, cement mortar completely encapsulates the tightened mechanical connectors, forming a rigid anchoring system. This design eliminates the risk of corrosion from the external environment, and the filling and constraint of cement mortar prevents the possibility of loosening during later use, significantly improving the reliability and service life of the connection nodes. Because it eliminates the need for on-site concrete pouring, it completely avoids problems such as wall deformation, formwork bursting, and concrete surface misalignment that may occur in traditional post-pouring processes. The flatness of the box-type walls can be precisely controlled during the factory prefabrication stage, resulting in excellent facade flatness after on-site connection, reducing subsequent wall finishing processes and improving the overall quality of the building. Compared to existing technologies, it achieves both efficient prefabrication and rapid installation of modular buildings, while ensuring the reliability of connection nodes and construction precision, providing a superior solution for the industrial application of modular buildings. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the connection system of the modular building box in Embodiment 1 of this utility model;

[0022] Figure 2 This is a front view schematic diagram of the baffle in Embodiment 1 of this utility model.

[0023] [Explanation of Labels in the Attached Image]

[0024] 1: First box body; 2: Second box body; 21: Small diameter section; 22: Large diameter section; 3: First mechanical joint; 41: Connecting rod; 42: Fastening head; 5: Baffle; 51: Grouting hole; 52: Grout outlet hole. Detailed Implementation

[0025] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0026] Example 1:

[0027] like Figure 1 As shown, this embodiment provides a connection system for a modular building box, including: a first mechanical joint 3, a second mechanical joint, a baffle 5, and a sealing component; the first mechanical joint 3 is embedded in the first box 1, and the mating end face of the first mechanical joint 3 is flush with the outer surface of the first box 1; the second box 2 has a reserved connection through hole, the baffle 5 is disposed in the connection through hole, and the connecting end of the second mechanical joint passes through the baffle 5 to connect with the mating end of the first mechanical joint 3; the sealing component is disposed between the first box 1 and the second box 2; the closed space formed by the first box 1, the second box 2, the sealing component, and the baffle 5 is filled with cement mortar.

[0028] Specifically, by pre-embedding the first mechanical joint 3 in the first housing 1 and integrating the second mechanical joint and baffle 5 in the second housing 2, the walls of the housing module can be prefabricated entirely in the factory, completely eliminating the wet work processes of on-site steel reinforcement, formwork sealing, and concrete pouring in traditional processes. Only mechanical joint connection and a small amount of grouting are required on-site, significantly reducing on-site construction intensity and simplifying the construction process. Using mechanical connectors instead of traditional pre-embedded reinforcing bars reduces the need for openings in the prefabricated molds, avoids the impact of transverse reinforcing bars on mold complexity, and reduces the difficulty of housing production. Simultaneously, eliminating transverse reinforcing bars compresses the housing transport width, avoiding the limitations of traditional reinforcing bars on transport dimensions, making housing transport more convenient and efficient. Through grouting within the pre-drilled holes, cement mortar completely encapsulates the tightened mechanical connectors, forming a rigid anchoring system. This design eliminates the risk of corrosion from the external environment, and the filling constraint of cement mortar prevents the possibility of loosening of the mechanical connections during later use, significantly improving the reliability and service life of the connection nodes. Because it eliminates the need for on-site concrete pouring, it completely avoids problems such as wall deformation, formwork bursting, and concrete surface misalignment that may occur in traditional post-pouring processes. The flatness of the box-type walls can be precisely controlled during the factory prefabrication stage, resulting in excellent facade flatness after on-site connection, reducing subsequent wall finishing processes and improving the overall quality of the building. Compared to existing technologies, it achieves both efficient prefabrication and rapid installation of modular buildings, while ensuring the reliability of connection nodes and construction precision, providing a superior solution for the industrial application of modular buildings.

[0029] In this embodiment, the first mechanical joint 3 is fixed in the bottom plate of the first housing 1 by anchoring steel bars, and the mating end face of the first mechanical joint 3 is flush with the wall surface of the first housing 1. The connecting through hole is opened in the wall of the second housing 2 corresponding to the position of the first mechanical joint 3.

[0030] Furthermore, such as Figure 1 As shown, the second mechanical connector includes an integrally formed connecting rod 41 and a fastening head 42. The free end of the connecting rod 41 serves as the connecting end of the second mechanical connector, passing through the baffle 5 and connecting to the mating end of the first mechanical connector 3. The fastening head 42 is located on the side of the baffle 5 opposite to the first mechanical connector 3 and presses against the baffle 5. The integral forming of the connecting rod 41 and the fastening head 42 avoids the risk of loosening associated with traditional welding or assembly joints, and improves the fatigue resistance of the connection node. The planar design of the fastening head 42 provides wrench operating space, making the threaded connection between the connecting rod 41 and the first mechanical connector 3 more efficient. The fastening head 42, located on the side of the baffle 5 opposite to the first mechanical connector 3 and pressing against the baffle 5, forms a mechanical stop, preventing connection failure caused by excessive screwing of the connecting rod 41 and ensuring consistent connection depth.

[0031] Furthermore, such as Figure 1 As shown, the connecting through hole is a prefabricated stepped hole, which includes a small-diameter section 21 and a large-diameter section 22 that are interconnected. A baffle 5 is positioned on the large-diameter section 22, at the connection point between the small-diameter section 21 and the large-diameter section 22. The small-diameter section 21 provides precise guidance, while the large-diameter section 22 accommodates the baffle 5 and the fastening head 42, achieving three levels of functions: guidance, positioning, and sealing. The prefabrication of the stepped hole avoids secondary drilling on-site, and the space in the large-diameter section 22 facilitates the installation of the baffle 5 and mortar filling. The transition area of ​​the stepped hole forms a stress buffer zone, reducing stress concentration and improving the wall's crack resistance. Specifically, the ratio of the diameters of the small-diameter section 21 to the large-diameter section 22 is 1:1.5~1.8, ensuring sufficient operating space for the fastening head 42 while maintaining the minimum thickness of the baffle 5 to avoid the risk of cracking due to excessively large hole diameters; moreover, it allows for a more rational mortar flow path, reducing void formation and improving sealing performance. Preferably, the ratio of the diameter of the smaller diameter segment 21 to the diameter of the larger diameter segment 22 is 1:1.5; preferably, the ratio of the diameter of the smaller diameter segment 21 to the diameter of the larger diameter segment 22 is 1:1.6; preferably, the ratio of the diameter of the smaller diameter segment 21 to the diameter of the larger diameter segment 22 is 1:1.7; preferably, the ratio of the diameter of the smaller diameter segment 21 to the diameter of the larger diameter segment 22 is 1:1.8.

[0032] Furthermore, in this embodiment, the connection method of the first mechanical joint 3 and the second mechanical joint is any one of the following:

[0033] The first mechanical connector 3 has an internal thread at its mating end, and the connecting rod 41 is a threaded rod, which is threadedly connected to the first mechanical head. The threaded connection allows for fine-tuning of the connection length on-site, accommodating prefabrication errors. The helical surface of the threaded pair makes the load distribution more uniform, improving pull-out and shear resistance. The thread tightening process provides clear tightening feedback, avoiding overtightening or loosening. Alternatively, the mating end of the first mechanical connector 3 is a concave slot, and the free end of the connecting rod 41 of the second mechanical connector is a convex plug; the concave slot and convex plug cooperate to achieve locking. Or, the mating end of the first mechanical connector 3 is provided with a helical groove, and the free end of the connecting rod 41 of the second mechanical connector is provided with a radial convex ridge; rotating the connecting rod 41 causes the convex ridge to embed into the helical groove to form a lock. The second type (socket type) and the third type (quick-tightening type) can significantly shorten the connection time for a single set, and multiple connection methods cover different load levels and construction scenarios.

[0034] Furthermore, such as Figure 2 As shown, the baffle 5 has a pre-drilled grouting hole 51 and a grout outlet hole 52; the grout outlet hole 52 is positioned higher than the grouting hole 51; cement mortar can be injected into the enclosed space through the grouting hole 51. The grout outlet hole 52 is higher than the grouting hole 51, creating a height difference. The combined effect of gravity and pressure ensures full mortar filling and facilitates air removal. The overflow of mortar can be observed through the grout outlet hole 52, allowing for a direct assessment of the filling effect and avoiding voids caused by traditional blind injection. In this embodiment, the cement mortar is a non-shrink mortar. Its non-shrinkage characteristic avoids volume shrinkage during the mortar hardening process, ensuring a tight bond with mechanical joints and the wall, eliminating leakage channels. Furthermore, non-shrink mortar typically has early strength characteristics, and its micro-expansion properties compensate for shrinkage stress, reducing crack formation.

[0035] Furthermore, such as Figure 1 As shown, the enclosure assembly includes multiple baffles; these baffles are positioned between the wall of the first enclosure 1 and the second enclosure 2. The baffles form a continuous sealing strip, blocking the intrusion of external moisture and dust. The baffles can accommodate slight displacement between the enclosures, preventing seal failure due to rigid contact. In this embodiment, the baffles are made of pearl cotton. The high elasticity of pearl cotton ensures that sealing pressure is maintained under long-term loads, and it also exhibits excellent aging resistance.

[0036] Example 2:

[0037] This embodiment provides a construction method for the connection system of the modular building box described in Embodiment 1, including the following steps:

[0038] S1. The first box 1 and the second box 2 are lifted to the design position by a crane, and preliminarily aligned by a guide device to ensure that the positional deviation between the connecting through hole and the first mechanical joint 3 is ≤3mm.

[0039] S2. Pass the connecting rod 41 of the second mechanical connector through the stepped hole small diameter section 21 of the second housing 2, so that the fastening head 42 is located on the side of the baffle 5 opposite to the first mechanical connector 3 and presses the baffle 5. Rotate the fastening head 42 with a wrench to tighten and fix the connecting rod 41 to the internal thread of the first mechanical connector 3. Check that the fastening head 42 and the baffle 5 fit tightly and there is no looseness or misalignment.

[0040] S3. Install pearl cotton baffles circumferentially at the joint between the first box 1 and the second box 2, and fix them by the slots or structural adhesive to form the first sealing line and ensure that the baffles are continuous without any breaks.

[0041] S4. Install pearl cotton baffles circumferentially at the joint between the first box 1 and the second box 2, and fix them with structural adhesive to form the first line of defense for sealing, ensuring that the baffles are continuous without any breaks. Then, connect the grouting equipment through the grouting hole 51 on the baffle 5 and inject non-shrink cement mortar until mortar overflows from the grout outlet 52 and no air bubbles are discharged, then stop grouting; during the grouting process, observe the joint of the box in real time, and seal it in time if grout leakage occurs to ensure that the closed space is fully filled.

[0042] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0044] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A modular building box connection system for connecting horizontally adjacent first boxes (1) and second boxes (2), characterized in that, include: The first mechanical joint (3), the second mechanical joint, the baffle (5), and the sealing assembly; The first mechanical joint (3) is embedded in the first housing (1), and the mating end face of the first mechanical joint (3) is flush with the outer surface of the first housing (1). The second housing (2) has a pre-reserved connection through hole, and the baffle (5) is set in the connection through hole. The connecting end of the second mechanical connector passes through the baffle (5) and connects to the mating end of the first mechanical connector (3). The enclosure is positioned between the first housing (1) and the second housing (2); The enclosed space formed by the first box (1), the second box (2), the sealing component and the baffle (5) is filled with cement mortar.

2. The connection system for modular building boxes as described in claim 1, characterized in that, The second mechanical joint includes an integrally formed connecting rod (41) and a fastening head (42); The free end of the connecting rod (41) serves as the connecting end of the second mechanical joint, passing through the baffle (5) and connecting to the mating end of the first mechanical joint (3); the fastening head (42) is located on the side of the baffle (5) opposite to the first mechanical joint (3) and presses the baffle (5).

3. The connection system for modular building boxes as described in claim 2, characterized in that, The connecting through hole is a prefabricated stepped hole, which includes a small diameter section (21) and a large diameter section (22) that are interconnected; The baffle (5) is located within the large diameter section (22) and stops at the connection between the small diameter section (21) and the large diameter section (22).

4. The connection system for modular building boxes as described in claim 3, characterized in that, The ratio of the diameters of the smaller diameter segment (21) to the larger diameter segment (22) is 1:1.5 to 1.

8.

5. The connection system for modular building boxes as described in claim 2, characterized in that, The connection method of the first mechanical joint (3) and the second mechanical joint is any one of the following: The mating end of the first mechanical joint (3) has an internal thread, the connecting rod (41) is a threaded rod, and the connecting rod (41) is threadedly connected to the first mechanical head; Alternatively, the mating end of the first mechanical connector (3) is a concave slot, and the free end of the connecting rod (41) of the second mechanical connector is a convex plug. The concave slot and the convex plug cooperate to achieve locking. Alternatively, the mating end of the first mechanical connector (3) is provided with a spiral groove, and the free end of the connecting rod (41) of the second mechanical connector is provided with a radial protrusion. Rotating the connecting rod (41) causes the protrusion to be embedded in the spiral groove to form a lock.

6. The connection system for modular building boxes as described in claim 1, characterized in that, The baffle (5) has a grouting hole (51) and a grout outlet hole (52) pre-reserved on it; The grout outlet (52) is located higher than the grout injection hole (51); cement mortar can be injected into the enclosed space through the grout injection hole (51).

7. The connection system for modular building boxes as described in claim 1, characterized in that, The cement mortar is a non-shrink mortar.

8. The connection system for modular building boxes as described in claim 1, characterized in that, The enclosure includes multiple stops; Multiple baffles are installed between the wall of the first housing (1) and the second housing (2).

9. The connection system for modular building boxes as described in claim 8, characterized in that, The stop bar is made of pearl cotton.

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